Now that I am using lossless compressed files on my Fuji X T-2, I wondered about these files and dng conversion. I have converted proprietary files, NEF, RAF, to dng for some time now. However, last night, after a lovely walk at the Steigerwald National Wildlife Refuge in nearby Washougal, Washington, I had another revelation. I did what I always do now, connected the camera to the computer with the USB3 cord (so I don't have to fiddle with easy to lose and misplace SD cards), downloaded my images and automatically converted them to dng. To my surprise, the RAF compressed files, which are in the 23MB range, doubled in size upon dng conversion in LR6.7! Initially I was not paying attention to file size, assuming that the dng conversion would save space as it does with uncompressed files. Uncompressed files, in the 48MB range shrink to <40MB files with dog conversion.
To conclude, if you use lossless compression on Fuji X T-2 files, leave them as RAF files, do not convert to dng, at least to save space, because you do not. If you use uncompressed, and I cannot see why, based on my previous question, dng conversion does save some space on the card and the computer as well.
Interesting.